Ground connection for electric circuits.



,5 N PATENTED FEB. 27, 1906 J. B. SIMPSON.

GROUND CONNECTION FOR ELECTRIC CIRCUITS.

, APPLI OOOOOOOOOOOO PR. 11,1905.

To all whom it UNITED STATES OF COLUMBIA.

PATENT @FFXCE.

or COLUMBIA, ASSIGNOR wAsrnNe'roN, DISTRICT GROUND CONNECTION FORELECTRIC ClRCUiTS.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed April 11. 1905. Serial No: 254.928.

ntay (JON/(367711.

Be it known that I, JOSEPH B. SIMPSON, a citizen of the United States,residing at Washington, in the District of Columbia, have invented a newand useful Ground Connection for Electric Circuits, of which thefollowing is a specification.

This invention relates to devices for form mg other electric circuits,pal object clip which and has for ts princito provide a connection, afurther object of the invention eing to provide a device of thischaracter which will render it unnecessary for the workman to carry morethan one size connection. A still further object of the invention is toprovide a pipe-clip which may be firmly clamped to a pipe'of any size,the clip being formed in sections which when clamped together Will bebound and held by frictional engagement with each other and with the 13e. p With these and other objects in view, as will more fullyhereinafter appear, the invention consists in certain novel features ofconstruction and arrangement ofparts, hereinafter fully described,illustrated inthe accompanying drawings, and particularly pointed out inthe appended claims, it being understood that various changes in theform,

proportions, size, and minor details of the structure may be madewithout departing from the s hit or SfiCIIfiCIII an of the ad p yvantages of the invention.

In the accompanymg drawings, Figure 1. 1S a a perspective view of aground connection, showing the same in position on the pipe. Fig. 2 is adetail perspective view of the two members of the connection detached.Fig. 3 is a plan view, on an enlarged scale, showing the pipe insection. Figs. 4 and 5 are detail views of portions of the modified formof clip.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawings.

In making ground connections for telephones and other lines as nowpracticed it is usual to scrape a water or-gas pipe at any convenientpoint, and then after stripping ground connections for telephone and 11carrying out the present invention a perforated ear 13 for the passageof a bolt e opposite member l5 of the clip is provided with a pluralityof spaced shoulders 16, disposed in alinement with each other and soarranged that when one of the strips is turned with respect to the otherthey may be adjusted to form a clip of any desired will be in positionto engage against the end of the slot 12. One end of the strip 15 isprovided with a clamping-ear 18, also perforated for the passage of thebolt.

It is not essential that the shoulders 16 bear against the end wall ofthe slot to insure In locking of the clip in place, for the reason thatthe two members of the clip will be held l'rictionally upon each otherand upon the pipe when the clamping-nut 20 is turned, alt ough, ofcourse, a tighter connection could be secured by adjusting the device sothat one or other set of shoulders would remain at the end of the slot12.

The construction may be modified in the manner shown in Figs. at and 5by employing a single set of shoulders 16 on one strip and provii'lingthe walls of the slot 12 with aphirality of pairs of recesses 12, aswill he clearly understood.

The ends of the clip members, which are turned to form theclamping-ears, are preferably doubled, is shmvn. in order to increaseand strengthen the rigidity of the cli p at the point where the greateststrain occurs.

A current-conducting wire may be clamped in position by placing the samebetween one of the pivot-ears and a washer surrounding the bolt, asshown in Fig. 3.

The clip is of such character that it may be readilyremovcd fromposition when no longer required and used for the grounding of anothercircuit, the clips being of such construc-- tion that they will last fora practically in definite period.

length, and when turned one set of shoulders Having thus described theinvention, what is claimed is 1 In a ground connection for electriccircuits, a clamp including two metallic strips, one having an elongatedslot, and the other being provided with a plurality of pairs ofshoulders for engagement with the end Wall of the slot, and means forclamping, said strips. around the pipe.

2. In a ground connection for electric circuits, a pipe-clamp includingtwo metallic strips, one end of one ofthe strips having an elongatedslot, and one end of the other strip 7 being provided-with a pluralityof pairs of 1 shoulders for engagement with the end wall of the slot,the opposite ends of the two strips being turned outward and bent toform rein forcing-ears, said' ears being perforated, and a clamping-boltextending through said ears and serving, also, as a binding-post for thecurrent-conducting wire.

In testimony that I claim the foregoing as I my own I have heretoaffixed my signature in the presence of two w1tnesses.

i JOSEPH B. SIMPSON. Witnesses:

E. K. Fox, FRED R. WALTER.

